While watching television, ______.

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问题 While watching television, ______.

选项 A、the telephone rang
B、we heard the telephone ring
C、and to play football
D、the telephone was rung

答案B

解析 前后分句的主语应一致,因此排除A和D;hear后可跟动词原形和现在分词形式,但不能跟过去式。
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